Introduction

The Hoymiles Single-phase Microinverter HM-1500 is a high-efficiency solar inverter designed to optimize energy production from photovoltaic systems. Capable of supporting up to four solar panels, it features dual Maximum Power Point Tracking (MPPT) technology, ensuring maximum energy harvest even in challenging conditions. The price for this microinverter is approximately $199.00. With a compact design and robust IP67 rating, the HM-1500 is built for durability and reliability. It operates within a wide voltage range and comes with a standard warranty of 12 years.

Technical Data

Warning: Be sure to verify the following before installing the Hoymiles Microinverter System.
Verify that the voltage and current specifications of the PV module match those of the microinverter.
The maximum open-circuit voltage rating of the PV module must be within the operating voltage range of the microinverter.
The maximum current rating at MPP is recommended to be equal to or less than the maximum input DC current. But the maximum short-circuit current must be equal to or less than the maximum input DC short-circuit current.
The output DC power of the PV module is NOT recommended to exceed 1.35 times the output AC power of the microinverter. Refer to the “Hoymiles Warranty Terms & Conditions” for more information.

DC Input

Model	HM-1000	HM-1200	HM-1500
Commonly used module power (W)	Up to 310 (single panel)	Up to 380 (single panel)	Up to 470 (single panel)
Peak power MPPT voltage range (V)	27–48	29–48	36–48
Start-up voltage (V)	22
Operating voltage range (V)	16–60
Maximum input voltage (V)	60
Maximum input current (A)	4 × 10.5	4 × 11.5	4 × 11.5
Maximum input short-circuit current (A)	4 × 15
Maximum backfeed current to array (A)	0

AC Output

Model	HM-1000	HM-1200		HM-1500
Rated output power (VA)			1000		1200	1500
Rated output current (A)			4.55@220 V 4.35@230 V 4.17@240 V		5.45@220 V 5.22@230 V 5.00@240 V	6.82@220 V 6.52@230 V 6.25@240 V
Nominal output voltage/range (V)			220/180–275 230/180–275 240/180–275
Nominal frequency/range (Hz)			45–55 (under 50 Hz @ 220 V & 230 V) 55–65 (under 60 Hz @ 220 V & 230 V)
Power factor			> 0.99 default 0.8 leading…0.8 lagging
Output current harmonic distortion			< 3%
Maximum units per branch			5@220 V 5@230 V 5@240 V		4@220 V 4@230 V 4@240 V	3@220 V 3@230 V 3@240 V

Efficiency, Safety and Protection

Model	HM-1000	HM-1200	HM-1500
Peak microinverter efficiency	96.70%
CEC weighted efficiency	96.50%
Nominal MPPT efficiency	99.80%
Night time power consumption (mW)	< 50

Mechanical Data

Model	HM-1000	HM-1200	HM-1500
Ambient temperature range (°C)	-40 to +65
Storage temperature range (°C)	-40 to +85
Dimensions (W × H × D mm)	280 × 176 × 33
Weight (kg)	3.75
Enclosure rating	Outdoor NEMA 6 (IP67)
Cooling	Natural convection (no fans)
Pollution degree	PD3

Features

Model	HM-1000	HM-1200	HM-1500
Topology	High-Frequency Transformers
Communication	2.4 GHz Proprietary RF (Nordic)
Monitoring	Hoymiles Monitoring System (Hoymiles DTU is required)
Warranty	12 years standard, 25 years optional
Compliance	VDE-AR-N 4105:2018, EN 50549-1:2019, VFR2019, AS 4777.2:2015, IEC/EN 62109-1/-2, IEC/EN 61000-3-2/-3, IEC/EN- 61000-6-1/-2/-3/-4

Note: Voltage and frequency ranges can be extended beyond nominal if required by the utility.

Important Notes

Product Range
This manual describes the assembly, installation, commissioning, maintenance and failure search for the following models of Hoymiles Microinverter:

HM-1000
HM-1200
HM-1500

Note: “1000” means 1000 W, “1200” means 1200 W, “1500” means 1500 W.

Target User
For safety purposes, only a qualified technician who has received training or has demonstrated competence may install and maintain this microinverter under the guidance of this document.

Symbols Used
The safety symbols in this user manual are shown below.

Symbol	Usage
DANGER	Indicates a hazardous situation that can result in deadly electric shock hazards, other serious physical injury, or fire hazards.
WARNING	Indicates directions which must be fully understood and followed in their entirety to avoid potential safety hazards, including equipment damage or personal injury.
CAUTION	Indicates that the described operation must not be carried out. The reader should stop, use with caution and fully understand the operations explained before proceeding.

About Safety

Important Safety Instructions

The HM-1000/HM-1200/HM-1500 Microinverter is designed and tested according to international safety requirements. However, certain safety precautions must be taken when installing and operating this microinverter. The installer must read and follow all instructions, precautions and warnings in this installation manual.

All operations including transport, installation, start-up and maintenance must be carried out by qualified and trained personnel.
Before installation, check the unit to ensure that it is free of any transport or handling damage, which could affect insulation integrity or safety clearances. Choose an installation location carefully and adhere to the specified cooling requirements. Unauthorized removal of necessary protections, improper use, and incorrect installation and operation may result in serious safety and shock hazards or equipment damage.
Before connecting the microinverter to the power distribution grid, contact the local power distribution grid company to obtain the appropriate approvals. This connection must be made only by qualified technical personnel. It is the responsibility of the installer to provide external disconnect switches and Overcurrent Protection Devices (OCPD).
Only one PV module can be connected to one input of the microinverter. Do not connect batteries or other power supply sources. The microinverter can be used only if all the technical characteristics are observed and applied.
Do not install the equipment in adverse environments, such as environments that are flammable, explosive, corrosive, extremely hot or cold, or humid. Do not use the equipment when the safety devices do not work or are disabled.
Always use personal protective equipment, including gloves and eye protection, while installing.
Inform the manufacturer of non-standard installation conditions.
Do not use the equipment if any anomalies are discovered while operating. Avoid temporary repairs.
All repairs should be carried out by using only qualified spare parts, which must be installed in accordance with their intended use and by a licensed contractor or authorized Hoymiles service representative.
Any liability arising from commercial components are delegated to their respective manufacturers.
Any time the microinverter has been disconnected from the public network, please be extremely cautious, as some components can retain charge sufficient to create a shock hazard. Prior to touching any part of the microinverter, please ensure that surfaces and equipment are under safe touch temperatures and voltage potentials before proceeding
Hoymiles accepts no liability for damage due to incorrect or improper operation.
Electrical Installation & Maintenance shall be conducted by a licensed electrician and shall comply with local wiring regulations.

About Product

About 4-in-1 Unit
“Daisy-Chain 4-in-1 Unit Microinverter” with ultra-wide DC input operating voltage range (16 V–60 V) and low start-up voltage (22 V only).
The Hoymiles 4-in-1 Unit Microinverter HM-1000/HM-1200/HM-1500 is a reliable solution for PV systems with an uneven number of panels, and offers high CEC weighted efficiency – 96.50% (peak efficiency 96.70%) in 2015.

Highlights

Maximum output power up to 1000 W/1200 W/1500 W. Adapted to 60-cell & 72-cell PV panels.
Peak efficiency 96.70%. CEC weighted efficiency 96.50%.
Static MPPT efficiency 99.80%. Dynamic MPPT efficiency 99.76% in overcast weather.
Power factor (adjustable) 0.8 leading…0.8 lagging.
External antenna for stronger communication with DTU.
High reliability: NEMA 6 (IP67) enclosure. 6000 V surge protection.

Terminals Introduction

hoymiles HM-1000 Single Phase Micro Inverter fig 1

Object	Description
A	AC Connector (Male)
B	AC Connector (Female)
C	DC Connectors

Dimension (mm)

hoymiles HM-1000 Single Phase Micro Inverter fig 2

About Function

Work Mode
Normal: In this mode, the microinverter operates normally and converts DC power into AC power to support the household loads and feeds into the public grid. Zero Export Control: In this mode, the microinverter’s generation is limited based on the current household loads, and there is no extra power fed into the public grid. Standby: There are several circumstances in which the microinverter will be in Standby mode:

The current condition contradicts with the microinverter operating requirements.
No household loads or the export control value has been set as “0” on the DTU in the Zero Export Control mode.

About Installation

Accessories

hoymiles HM-1000 Single Phase Micro Inverter fig 3

Object		Description
A	AC End Cable (Female), 2 m 12 AWG Cable
B	M8 × 25 Screws
C	DC Extension Cable, 1 m
D	AC Female End Cap, IP67
*Note: All accessories listed above are not included in the package, and need to be purchased separately. Please contact our sales representative for pricing information. (M8 screws need to be prepared by installer-self.)

Description

The Hoymiles HM-1500 microinverter is a compact, lightweight device that can be easily installed on the back of solar panels. Its sleek design and weather-resistant housing ensure durability and reliability in various environmental conditions. The microinverter features advanced MPPT (Maximum Power Point Tracking) technology, which optimizes energy production by continuously tracking the maximum power point of the solar panel.

The HM-1500 also includes built-in Wi-Fi and Zigbee communication modules, enabling seamless integration with the Hoymiles monitoring system. This allows users to monitor their solar system's performance remotely through the Hoymiles app, providing real-time data on energy production, consumption, and system health.

Installation Precautions

Please install the microinverter and all DC connections under the PV module to avoid direct sunlight, rain exposure, snow pile-up, UV, etc. Allow a minimum of 2 cm of space around the microinverter enclosure to ensure ventilation and heat dissipation.
Note: For some countries, the DTU will be required to meet local grid regulations (e.g. G98/99 for UK).

hoymiles HM-1000 Single Phase Micro Inverter fig 4

Required Space Distance

If the microinverters are installed on a concrete roof or steel roof, their communication with the DTU may be slightly affected. Under such installation conditions, it is better for the microinverters to be installed 50 cm above the roof. Otherwise, more DTUs may be required to ensure communication quality between the DTUs and the microinverters.

hoymiles HM-1000 Single Phase Micro Inverter fig 5

Grounding Considerations

This microinverter is a Class I equipment with a basic isolation transformer, and this microinverter must be earthed. There is an earth wire inside the AC cable, so usually grounding can be done by directly using this wire. If the utility has any special requirements, grounding can be done by affixing the mounting bracket to the racking.

Preparation

Installation of this equipment is carried out based on the system design and the place in which the equipment is installed.

Installation must be carried out with the equipment disconnected from the grid (power disconnect switch on) and with the PV modules shaded or isolated.
Refer to the Technical Data to ensure that the environmental conditions fit the requirements of the microinverter (degree of protection, temperature, humidity, altitude, etc.)
To avoid power de-rating due to an increase in the internal temperature of the microinverter, do not expose it to direct sunlight.
To avoid overheating, always make sure that the air flow around the microinverter is not blocked.
Do not install in places where gases or flammable substances may be present.
Avoid electromagnetic interference that can compromise the correct operation of electronic equipment.

When choosing the installation position, comply with the following conditions:

Only install on structures specifically conceived for PV modules (supplied by installation technicians).
Install the microinverter underneath the PV modules to make sure that it operates in a shaded or shadowed environment. If this condition cannot be met, it may trigger the microinverter production de-rating.

Installation Steps

Step 1. Attach Microinverter on Rail

Mark the approximate center of each panel on the frame.
Fix the screw on the rail.
Hang the microinverter on the screw (as shown in the picture on the right), and tighten the screw. The silver cover side of the microinverter should be facing the panel.

Step 2. Connect AC Cables of Microinverter

Plug the AC connector of the first microinverter into the connector of the second microinverter to form a continuous AC branch circuit.
Note: The length of AC cable on microinverter is roughly 2.06 m, if the distance between two microinverters is more than the AC cable, please use an AC extension cable between two microinverters (as shown in the picture on the right).
Install the AC end cap on the open AC connector of the last microinverter in the AC branch circuit.

Step 3. Connect AC End Cable

hoymiles HM-1000 Single Phase Micro Inverter fig 9

Create the end cable
1. Separate the AC port into 3 parts.
2. Insert the AC cable from Part 3 to Part 2, and complete the wiring for the L, N and Ground inside the Part 1 AC port accordingly.
  Note:
  L: Brown wire
  N: Blue wire
  G: Yellow/Green wire
  Please use 12 AWG cable as the AC end cable.
3. Plug the AC port Part 2 into Part 1 once the wiring is complete, then screw on Part 3 to complete the AC extension cable.
Connect the AC end cable to the AC male connector of the first microinverter to complete the circuit.
Connect the other side of the AC end cable to the distribution box, and wire it to the local grid network. Step

Create an Installation Map

Peel the removable serial number label from each microinverter (the position of the label is shown on the right).
Affix the serial number label to the respective location on the installation map.

Connect PV Modules

Mount the PV modules above the microinverter.
Connect the PV modules’ DC cables to the DC input side of the microinverter.

Energize the System

Turn on the AC breaker of the branch circuit.
Turn on the main AC breaker of the house. Your system will start to generate power after about two minutes of waiting time.

Set Up the Monitoring System

Refer to the DTU User Manual or DTU Quick Installation Guide, and Quick Installation Guide for S-Miles Cloud (Hoymiles Monitoring Platform) Online Registration to install the DTU and set up your monitoring system.

Troubleshooting

This microinverter can only work with the new Hoymiles DTU (DTU-Pro, DTU-Lite and DTU-W100/DTU-G100) with the following serial number.

Model	Serial Number
DTU-Pro	10F7xxxxxxxx
	10F8xxxxxxxx
	10FAxxxxxxxx
DTU-G100	10D2xxxxxxxx
DTU-W100	10D3xxxxxxxx
DTU-Lite	10D6xxxxxxxx

Troubleshooting List

Alarm Code	Alarm Name	Suggestion
121	Over temperature protection	1. Check the ventilation and ambient temperature at the microinverter installation position. 2. If the ventilation is poor or the ambient temperature exceeds the limit, improve the ventilation and heat dissipation. 3. If both the ventilation and ambient temperature meet the requirements, contact your dealer or Hoymiles Technical Service Center.
125	Grid configuration parameter error	1. Check if the grid configuration parameter is correct and upgrade again. 2. If the fault still exists, contact your dealer or Hoymiles Technical Service Center.
126	Software error code 126	1. If the alarm occurs accidentally and the microinverter can still function normally, no special treatment is required. 2. If the alarm occurs frequently and cannot be restored, contact your dealer or Hoymiles Technical Service Center.
127	Firmware error	1. Check if the firmware is correct and upgrade again. 2. Check the communication between the DTU and Hoymiles Monitoring System, as well as the communication between the DTU and the microinverter. Then try again. 3. If the fault still exists, contact your dealer or Hoymiles Technical Service Center.
128	Software error code 128	1. If the alarm occurs accidentally and the microinverter can still function normally, no special treatment is required. 2. If the alarm occurs frequently and cannot be restored, contact your dealer or Hoymiles Technical Service Center.
129	Software error code 129	1. If the alarm occurs accidentally and the microinverter can still function normally, no special treatment is required. 2. If the alarm occurs frequently and cannot be restored, contact your dealer or Hoymiles Technical Service Center.
130	Offline	1. Please check if the microinverter works normally. 2. Check the communication status between the DTU and Hoymiles Monitoring System, or between the DTU and the microinverter. Try to make improvements if the communication is poor. 3. If the alarm occurs frequently and cannot be restored, contact your dealer or Hoymiles Technical Service Center.

141

Grid overvoltage

1. If the alarm occurs accidentally, the grid voltage may be temporarily abnormal. The microinverter will automatically recover after grid voltage returns to normal.

2. If the alarm occurs frequently, check whether the grid voltage is within the acceptable range. If it is not, contact the local power operator or change the grid overvoltage protection limit via the Hoymiles Monitoring System after obtaining the consent of the local power operator.

142

Grid overvoltage (10- minute average value)

1. If the alarm occurs accidentally, the grid voltage may be temporarily abnormal. The microinverter will automatically recover after grid voltage returns to normal.

143

Grid undervoltage

1. If the alarm occurs accidentally, the grid voltage may be temporarily abnormal. The microinverter will automatically recover after grid voltage returns to normal.

2. If the alarm occurs frequently, check whether the grid voltage is within the acceptable range. If it is not, contact the local power operator or change the grid undervoltage protection limit via the Hoymiles Monitoring System after obtaining the consent of the local power operator.

3. If the fault still exists, check the AC switch or AC wiring.

144

Grid overfrequency

1. If the alarm occurs accidentally, the grid frequency may be temporarily abnormal. The microinverter will automatically recover after grid frequency returns to normal.

2. If the alarm occurs frequently, check whether the grid frequency is within the acceptable range. If it is not, contact the local power operator or change the grid overfrequency protection limit via the

Hoymiles Monitoring System after obtaining the consent of the local power operator.

145

Grid underfrequency

1. If the alarm occurs accidentally, the grid frequency may be temporarily abnormal. The microinverter will automatically recover after grid frequency returns to normal.

2. If the alarm occurs frequently, check whether the grid frequency is within the acceptable range. If it is not, contact the local power

operator or change the grid underfrequency protection limit via the Hoymiles Monitoring System after obtaining the consent of the local power operator.

146

Rapid grid frequency changes

1. If the alarm occurs accidentally, the grid frequency may be temporarily abnormal. The microinverter will automatically recover after grid frequency returns to normal.

2. If the alarm occurs frequently, check whether the grid frequency change rate is within the acceptable range. If it is not, contact the local power operator or change the grid frequency change rate limit via the Hoymiles Monitoring System after obtaining the consent of the local power operator.

147

Power grid outage

Please check whether there is a power grid outage.

148

Grid disconnection

Please check whether the AC switch or AC wiring functions normally.

149

Island detected

1. If the alarm occurs accidentally, the grid voltage may be temporarily abnormal. The microinverter will automatically recover after grid voltage returns to normal.

2. If the alarms occur frequently on all the microinverters in your station, contact the local power operator to check whether there is a grid island.

3. If the alarm still exists, contact your dealer or Hoymiles Technical Service Center.

205	Input port 1 & 2 overvoltage	1. Please make sure that the PV module open-circuit voltage is less than or equal to the maximum input voltage. 2. If the PV module open-circuit voltage is not within the normal range, contact your dealer or Hoymiles Technical Service Center.
206	Input port 3 & 4 overvoltage	1. Please make sure that the PV module open-circuit voltage is less than or equal to the maximum input voltage. 2. If the PV module open-circuit voltage is not within the normal range, contact your dealer or Hoymiles Technical Service Center.
207	Input port 1 & 2 undervoltage	1. Please make sure that the PV module open-circuit voltage is less than or equal to the maximum input voltage. 2. If the PV module open-circuit voltage is not within the normal range, contact your dealer or Hoymiles Technical Service Center.
208	Input port 3 & 4 undervoltage	1. Please make sure that the PV module open-circuit voltage is less than or equal to the maximum input voltage. 2. If the PV module open-circuit voltage is not within the normal range, contact your dealer or Hoymiles Technical Service Center.
209	Port 1 no input	1. Please confirm whether this port is connected to the PV module. 2. If the PV module is connected, please check the DC cable connection between this port and the PV module.
210	Port 2 no input	1. Please confirm whether this port is connected to the PV module. 2. If the PV module is connected, please check the DC cable connection between this port and the PV module.
211	Port 3 no input	1. Please confirm whether this port is connected to the PV module. 2. If the PV module is connected, please check the DC cable connection between this port and the PV module.
212	Port 4 no input	1. Please confirm whether this port is connected to the PV module. 2. If the PV module is connected, please check the DC cable connection between this port and the PV module.
213	PV-1 & PV-2 abnormal wiring	Please check whether the DC connections on Port 1 and 2 are correct.
214	PV-3 & PV-4 abnormal wiring	Please check whether the DC connections on Port 3 and 4 are correct.
301	Hardware error code 301	1. If the alarm occurs accidentally and the microinverter can still function normally, no special treatment is required. 2. If the alarm occurs frequently and cannot be restored, contact your dealer or Hoymiles Technical Service Center.
302	Hardware error code 302	1. If the alarm occurs accidentally and the microinverter can still function normally, no special treatment is required. 2. If the alarm occurs frequently and cannot be restored, contact your dealer or Hoymiles Technical Service Center.
303	Hardware error code 303	1. If the alarm occurs accidentally and the microinverter can still function normally, no special treatment is required. 2. If the alarm occurs frequently and cannot be restored, contact your dealer or Hoymiles Technical Service Center.
304	Hardware error code 304	1. If the alarm occurs accidentally and the microinverter can still function normally, no special treatment is required. 2. If the alarm occurs frequently and cannot be restored, contact your dealer or Hoymiles Technical Service Center.
305	Hardware error code 305	1. If the alarm occurs accidentally and the microinverter can still function normally, no special treatment is required. 2. If the alarm occurs frequently and cannot be restored, contact your dealer or Hoymiles Technical Service Center.

306

Hardware error code 306

1. If the alarm occurs accidentally and the microinverter can still function normally, no special treatment is required.

2. If the alarm occurs frequently and cannot be restored, contact your dealer or Hoymiles Technical Service Center.

307

Hardware error code 307

1. If the alarm occurs accidentally and the microinverter can still function normally, no special treatment is required.

2. If the alarm occurs frequently and cannot be restored, contact your dealer or Hoymiles Technical Service Center.

308

Hardware error code 308

1. If the alarm occurs accidentally and the microinverter can still function normally, no special treatment is required.

2. If the alarm occurs frequently and cannot be restored, contact your dealer or Hoymiles Technical Service Center.

Status LED Indicator

The LED flashes five times at startup. All green flashes (1s gap) indicate normal startup.

hoymiles HM-1000 Single Phase Micro Inverter fig 12

(1) Startup Process

• Five green flashes (0.3s gap): Startup success

• Five red flashes (0.3s gap): Startup failure

(2) Running Process

• Fast green flashing (1s gap): Producing power.

• Slow green flashing (2s gap): Producing power, but one input is abnormal.

• Slow green flashing (4s gap): Producing power, but there is no communication with DTU.

• Red flashing (1s gap): Not producing power, AC grid fault (voltage or frequency out of range).

• Red flashing (0.5s gap): Non-grid abnormality fault.

(3) Other Status

• Alternating red and green flashing: Firmware is corrupted.

*Note: All faults are reported to the DTU, refer to the local DTU app or S-Miles Cloud (Hoymiles Monitoring Platform) for more information.

Insulation Resistance Detection

There is a resistance sensor in the microinverter to measure the resistance between the outputs of PV module and the ground. If there is a problem with PV module insulation, DC wiring or connectors of the module and so on, the resistance between the outputs of the module and the ground may decrease. If this resistance drops below a preset threshold, the microinverter will stop producing power and report this ground fault. This fault will persist until it is cleared on the S-Miles Cloud (Hoymiles Monitoring Platform). This fault will persist until the microinverter is rebooted.
Please note that this fault cannot be cleared if the cause of the failure is still present. If the fault persists, contact your installer or Hoymiles for possible replacement.

On-site Inspection (for qualified installer only)

To troubleshoot an inoperable microinverter, follow the steps mentioned below.

1	Verify that the utility voltage and frequency are within ranges shown in the Technical Data appendix of this microinverter.
2	Check the connection to the utility grid. Verify that the utility power is present at the microinverter in question by removing AC, then DC power. Never disconnect the DC wires while the microinverter is producing power. Re-connect the DC module connectors and watch for five short LED flashes.
3	Check the AC branch circuit interconnection between all the microinverters. Verify that each microinverter is energized by the utility grid as described in the previous step.
4	Make sure that any AC breakers are functioning properly and are closed.
5	Check the DC connections between the microinverter and the PV module.
6	Verify that the PV module DC voltage is within the allowable range shown in the Technical Data appendix of this manual.
7	If the problem persists, please call Hoymiles customer support.
	Do not try to repair the microinverter. If troubleshooting fails, please return it to the factory for replacement.

Routine Maintenance

Only authorized personnel are allowed to carry out the maintenance operations, and such personnel are responsible for reporting any anomalies.
Always use the personal protective equipment provided by the employer when carrying out maintenance.
During normal operation, check that the environmental and logistical conditions are correct. Make sure that these conditions have not changed over time and that the equipment is not exposed to adverse weather conditions and has not been covered with foreign bodies.
DO NOT use the equipment if any problems are found, and restore the proper conditions after resolving the problems.
Conduct an annual inspection of the various components, and clean the equipment with a vacuum cleaner or special brushes.

	Do not attempt to dismantle the microinverter or make any internal repairs! In order to preserve the integrity of safety and insulation, the microinverters are not designed to allow internal repairs!
	The AC output wiring harness (AC drop cable on the microinverter) cannot be replaced. If the cord is damaged, the equipment should be scrapped.
	Maintenance operations must be carried out with the equipment disconnected from the grid (grid power switch on) and the PV modules obscured or isolated, unless otherwise indicated.
	For cleaning, do not use rags made of filamentary materials or corrosive products that may corrode parts of the equipment or generate electrostatic charges.
	Avoid temporary repairs. All repairs should be carried out by using only genuine spare parts.
	If all microinverters connect to the DTU-Pro, the DTU can limit the output power imbalance of all microinverters between phases to below 3.68 kW if required. Please refer to the “Hoymiles Technical Note Limit Phase Balance” for more details.

Each branch should provide a 20 A circuit breaker, but a central protection unit is not required.

Microinverter Replacement

a. How to remove the microinverter:

• De-energize the AC branch circuit breaker.

• Remove the PV panel from the racking and cover the panel.

• Use a meter to measure and make sure that there is no current flowing in the DC wires between the panel and the microinverter.

• Use the DC disconnect tool to remove the DC connectors.

• Use the AC disconnect tool to remove the AC connectors.

• Unscrew the fixing screw on the top of the microinverter and remove the microinverter from the PV racking.

b. How to replace the microinverter:

• Please record down the new microinverter’s SN.

• Please make sure that the AC branch circuit breaker is off, and follow the microinverter installation steps to install the replacement unit.

• Go to the Monitoring Platform (if the customer already registered this station online) and access the “Devices” page to find the device that you just replaced. Click the “Device Maintenance” button to jump to the new page and select “Replace Device”. Enter the new microinverter’s SN and click the “OK” button to complete the replacement.

hoymiles HM-1000 Single Phase Micro Inverter fig 13

Setup Guide

To set up the Hoymiles HM-1500 microinverter, follow these steps:

Mount the microinverter on the back of the solar panel, ensuring proper alignment and secure fastening.
Connect the DC cables from the solar panel to the microinverter.
Connect the AC cable from the microinverter to the household electrical system or grid connection point.
Configure the microinverter using the Hoymiles app or web portal, ensuring it is paired with your monitoring account.

Appendix

Installation Map

WIRING DIAGRAM

230 VAC SINGLE-PHASE:

230 VAC / 400 VAC THREE-PHASE:

120 VAC / 240 VAC SPLIT-PHASE:

120 VAC / 208 VAC THREE-PHASE

Pros & Cons

Pros:

High Efficiency: Up to 97% efficiency ensures maximum energy harvesting.
Real-time Monitoring: Detailed insights into energy production and consumption via the Hoymiles app.
Compact Design: Easy to install and integrate with existing solar panel systems.
Long Warranty: 25-year limited warranty provides peace of mind for long-term reliability.

Cons:

Cost: Although competitively priced, it may still be out of budget for some homeowners.
Complexity: Requires some technical knowledge for setup and configuration.
Dependence on Technology: Relies on Wi-Fi or Zigbee for monitoring, which can be affected by network issues.

Customer Reviews

Customers have praised the Hoymiles HM-1500 for its ease of installation, high efficiency, and comprehensive monitoring capabilities. Some users have noted that the setup process can be slightly complex but overall appreciate the detailed real-time data provided by the Hoymiles app.

A common complaint is the occasional connectivity issue with the monitoring system, but these are generally resolved with a quick restart or update of the app.

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